Brides: A Four-Tier, Brown Fondant Wedding Cake. There's a reason so many couples exchange chocolate on Valentine's Day. It's delicious, it boosts endorphins, and it's widely thought to be an aphrodisiac. With that in mind, we're surprised that it's still a unique choice for a wedding cake! While white%u2014utterly classic, versatile, and a foolproof choice%u2014is the most common wedding cake color, we think cakes in deep, rich tones convey serious, heart-fluttering romance.